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CVE-2026-21620VulnerabilityPublished Updated

SUSE · Security update for erlang

Affects SUSESource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-21620· Low 2.3

Not known to be exploited · CVSS 2.3 Low · fixed in SUSE package updates : update SUSE otp when convenient.

Data as of 12 Nov 2026, 13:34 UTC

CVSS 4.0 base score
2.3Low
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (EEF)CVSS 4.02.3
Patch
Available – fixed in 7.0, 1.1.1.1
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 12 Nov 2026.

What to do

Upgrade OTP and inets to 7.0; tftp to 1.1.1.1.

Affected software

ProductAffectedFixed in
OTPotpAffected
  • >=17.0 <26.2.5.17
Fixed in–
OTPinetsAffected
  • >=5.10 <7.0
Fixed in
  • 7.0
OTPtftpAffected
  • >=1.0 <1.1.1.1
Fixed in–
OTPerlang/otpAffected
  • ≥ 07b8f441ca711f9812fad9e9115bab3c3aa92f79, < 655fb95725ba2fb811740b57e106873833824344
Fixed in–
GitHubinetspkg:github/inetsOther threatsAffected
  • >=5.10 <7.0
Fixed in
  • 7.0
GitHubtftppkg:github/tftpOther threatsAffected
  • >=1.0 <1.1.1.1
Fixed in
  • 1.1.1.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This update for erlang fixes the following issues: Security issues fixed: - CVE-2026-21620: improper isolation and compartmentalization can lead to TFTP relative path traversal and remote arbitrary reads/writes (bsc#1258663). - CVE-2026-23941: improper handling of duplicate Content-Length headers in Erlang OTP can lead to HTTP request smuggling (bsc#1259687). - CVE-2026-23942: improper limitation of a pathname to a restricted directory in the SFTP server can lead to path traversal (bsc#1259681). - CVE-2026-23943: improper handling of highly compressed data in Erlang OTP ssh can lead to denial of service (bsc#1259682). - CVE-2026-28808: incorrect authorization can lead to unauthenticated access to protected CGI scripts (bsc#1261728). - CVE-2026-28810: predictable DNS transaction IDs can lead to DNS cache poisoning (bsc#1261726). - CVE-2026-32144: missing signature verification can lead to OCSP authorization bypass and information disclosure (bsc#1261734). Other updates and bugfixes: - jinterface: allow to build determenistic OtpErlang.jar (bsc#1262288).

References

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